1. (1) Except as provided in sections (2) and (3) of this rule, side clearance for bridges and tunnels is 8 feet as measured from centerline of track.
2. (2) Minimum side clearance in tunnels and through bridges may be decreased, above 14 feet 6 inches, to the extent defined by a half-circumference of a circle having a radius of 8 feet with its center at a point 14 feet 6 inches above top of rail directly over the centerline of track. This rule does not alter the 20 feet 9 inches overhead clearance requirement of OAR 741-305-0010.
3. (3) Except where walkways are used by employees engaged in switching, the minimum side clearance does not apply to the lower section of a bridge so long as no part of the structure falls inside an encroachment line drawn from a point 5 feet from centerline of track and level with top of rail, diagonally upward to a point 8 feet from centerline of track at a height 4 feet above top of rail.

4. (4) See Figure 310-3 for a diagram of minimum clearances for tunnels and through bridges. See Figure 310-4 for a diagram of minimum clearances for the lower section of bridges.

   [ED. NOTE: Figures referenced are available from the agency.]

Statutory/Other Authority

ORS 184.616, 184.619, 823.011 & 824.052

Statutes/Other Implemented

ORS 824.050 & 824.052

History

RD 1-2006, f. & cert. ef. 8-28-06
RS 2-1998, f. & cert. ef. 8-20-98
RS 2-1996, f. & cert. ef. 3-14-96, Renumbered from 860-044-0115
PUC 4-1983, f. & ef. 5-3-83, Order No. 83-24
PUC 13-1981, f. & ef. 12-21-81, Order No. 81-900